00722cam a22002531 4500 agr51000548 DLC 20260227111016.0 770207s1951 nyua b 001 0 eng c agr51000548 (OCoLC)2724767 U. S. Dept. of Agr. Libr. NbU DLC premarc SB601 .P9 464.4 P99 632 Pyenson, Louis, 1909- Elements of plant protection. With line drawings by Emily B. Steffens. New York, Wiley, 1951. x, 538 p. illus. 22 cm. Wiley farm series "Selected reference books": p. 488-491 Agricultural pests 11391 11391